Dissertation > Industrial Technology > Energy and Power Engineering > Internal combustion engine > General issues > Theory

Experimental Study on Iso-octane HCCI Combustion Characteristics by the Use of a Rapid Compression Machine

Author YuHongTao
Tutor ZhangJiPeng
School Jilin University
Course Power Machinery and Engineering
Keywords Power Machinery and Engineering Isooctane HCCI Burning Characteristics Rapid Compression
Type Master's thesis
Year 2007
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Indigenously developed fast compressor isooctane HCCI pilot study isooctane HCCI Combustion . First the characteristics of the experimental device to determine the boundary conditions , to determine the isooctane mixture combustion process parameter calculation method ; then isooctane HCCI combustion model of a mixed gas of the excess air coefficient , into the influence of boundary conditions such as a temperature of the combustion trials. Chemical reaction kinetics and combustion theory , research and analysis of the test results , and found that the regularity . Determine the various combustion conditions parameters through the combustion analysis under different combinations of combustion conditions , the impact of burning law , including the maximum pressure of the combustion pressure increases the rate of heat release rate , heat release , ignition delay period , the reaction temperature and combustion characteristics the impact of the law . The study of the two - part test . The first is the intake air temperature influence on the combustion process , followed by concentration of the mixture on the combustion process . The test found that the decreasing excess air ratio , combustion discharge heat and combustion temperature of the upward trend , the curve is steep . In the excess air coefficient is very small both the intake air temperature in the fuel concentration in large (λ = 2) for the combustion process is relatively weak, but with the increase of the excess air coefficient , inlet temperature for the whole of the combustion process also gradually enhanced. Inlet temperature isooctane HCCI combustion through a pilot study law . I.e. , as the intake air temperature increases , iso- octane HCCI combustion starting point in advance, the heat release rate and pressure rise rate to discharge the heat and the reaction temperature curve steeper .

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